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The learning objectives of this section
is to ensure relevant personnel
acquainted with
Tang kids to be crude oil washed
crude oil washing at sea between ports
use of inert gas
vapor emission control
precautions against electrostatic
generation
discharge of dirty ballast
before departure ballast voyage after
the complete discharge of cargo the
following tanks should have been crude
and washed
a-all departure and arrival ballast
tanks permitting compliance with trim
and draft requirements and a C and D
below
be in addition about one-fourth of the
remaining cargo tax on rotational basis
for sludge control however the sledge
control no tank needs to be crude oil
washed more than once every four months
see the molded to draft midships DM or
draft midget in meters shall not be less
than draft midget equals 2.0 plus 0.02
times the length
d the trim by Stern should not be
greater than 0.01 five times the length
with full immersion of the propellers
account is taken of the ships trading
pattern and the expected weather
conditions so that additional ballast
water is not put into tax which have not
been crude oil washed
crude oil washing shall not be conducted
between the final discharge and loading
ports that is the say no crude oil
washing should be undertaken during the
ballast voyage
ballast water shall not be put into
tanks that have not been crude oil
washed
water that is put into a tank which is
being crude oil washed but not water
inst should be regarded as dirty ballast
at the end of cargo discharge all cargo
mains and stripping lines should be
drained and stripped and the drainings
and stripping's discharged ashore via
the special small diameter
in addition all cargo tanks to be
stripped before the ship leaves its
final port of discharge
all crude oil washing must be completed
before the ship leaves its final port of
discharge
where any tank is crude oil washed while
the ship is at sea between multiple
discharge ports the tank should be left
empty and available for inspection of
the next discharge port before
commencing the next ballast voyage this
inspection may consist of multiple
sounding or dipping of the bottom of the
tank and the tank is empty
departure ballast tanks Shalee ballasted
prior to departure from port so that
examination of the surface of the
ballast water can be made
the discharge of departure ballast and
any of the water effluent discharged
during the ballast voyage to comply with
the following requirements of regulation
nine of an x1 of Marple 7378
this is simply be capable of delivering
inert gas to the cargo tanks at a rate
of at least a hundred twenty-five
percent of the maximum rate of discharge
capacity
no tank shall be crude oil washed unless
the inert gas system is in proper
operation
before each tank is crude oil washed the
oxygen level shall be determined at a
point 1 meter from the deck and at the
middle region of the Elledge space and
neither of these determinations should
exceed eight percent by volume
the oxygen level of the inert gas being
delivered during the washing process
shall be continuously monitored if dude
in crude oil washing
a the oxygen level of the inert gas
being delivered its seeds 5% by volume
or
be the pressure of the atmosphere the
tanks is no longer positive
the washing must be stopped until
satisfactory conditions are restored
to avoid excessive electrostatic
generation in the washing process due to
the presence of water the crude oil
washing fluid the contents of any tank
to be used as a source of crude oil
washing fluid his first be discharged by
at least one meter before being used
any tank used as a slop tank on the
previous ballast voyage shall be
completely discharged and refilled with
dry crude oil if that tank is to be used
as a source of washing fluid
on ships which these specifications
apply that will be means to avoid vapor
emission during the filling of departure
ballast wherever local conditions
require it
the method of preventing the emission of
hydrocarbon vapor into the atmosphere
shall be
a by the use of segregated ballast tanks
wherever these are sufficient to provide
the minimum departure draft or
be by containment of vapor in empty
cargo tanks by simultaneous ballasting
and cargo discharge
alternative methods that a satisfactory
to administration may be accepted
provided an equivalent degree of
environmental protection is provided